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Postprandial Lipids in Blood Plasma of Preruminant Calves

Laboratorie d'étude du Métablisme Energéntique, Centre de Recherches Zootechniques et Vétérinairies, Theix 63110 Beaumont, France

ABSTRACT

Four 3-wk-old calves were fed twice a day a milk replacer containing 21% tallow. Lipids in blood plasma were studied for 7 h after the morning meal. Fatty acid concentration in each class of lipids was determined by internal standard procedure.

Results were homogenous among animals. Postprandial time had a highly significant effect on both qualitative and quantitative aspects of fatty acids in plasma. A considerable increase in phospholipemia and ester cholesterolemia was seen 5 h after the meal. Increases in triglyceridemia were seen both 3 and 7 h after the meal. The former was related to highly saturated triglycerides and the latter to unsaturated triglycerides resembling alimentary triglycerides. Two hours after the meal, the nonesterified fatty acid pattern showed high saturation.